Is time travel possible if the A theory of time is correct? Ditto with presentism, which also has states in between, else it is a series of discreet jumps. — noAxioms
I don't think that's the case with presentism. What we notice at the present is activity, not a static state. This is what makes presentism so difficult. We notice that things are changing at the present, but logic will tell us that change requires a quantity of time. How is the present a quantity of time?
Suppose I say "now". That takes a period of time. So the present represented by that expression is a period of time. With modern technology, we reduce that period of time to the tiniest fraction of a second. nevertheless, it remains a period of time. We could say that the present is a second, a picosecond, a Planck length, and that is going toward a shorter and shorter quantity of time. We could go the other way, and say that the present is an hour, a day, a year, a million years, or billions of years. It is an arbitrary designation to stipulate that the present has a duration of X length. Nevertheless, the present always consists of a quantity of time, and therefore cannot be represented by states because things change in that quantity of time.
Getting down to the quantum level, neither case is infinite regress. There comes a point where no measurements are taken and there are no intermediate states. This comes from me, who has thrown his lot in with the principle of locality rather than the principle of counterfactual definiteness. Can't have both.... — noAxioms
The problem, and this is what Aristotle demonstrated, is that there must be something intermediate between the two states, or else the change is not accounted for in the description, therefore the description is deficient. It doesn't matter if it's at the level of twenty seconds, or the Planck level, if the description is of two successive, and different states, there must be something intermediary to account for the "becoming" (the change from one state to the next). If your description is only in "states" then there is necessarily an infinite regress. If you posit Planck length to put an end to the infinite regress, then you still have the very same problem, but at a tiny level. You have two successive different states, with no description of how things change from one state to the next. Therefore we must posit a "becoming" which occurs between the two states. This is the argument which Aristotle used to demonstrate that "being" (as states) is fundamentally incompatible with "becoming" (change or activity). That's why he proposed a hylomorphic dualism, to account for these two distinct aspects of reality.